<template>
  <div class="list" ref="wrapper">
    <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.clickCity}}</div>
                </div>
            </div>
        </div>

        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper" v-for="item of hotCities" :key="item.id" @click="handleCityClick(item.name)">
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>

        <div class="area" v-for="(items,key) of allCities" :key="key" :ref="key">
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
              <div class="item border-bottom"
                v-for="item of items" :key="item.id"
                @click="handleCityClick(item.name)"
              >
              {{item.name}}</div>
            </div>
        </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations, mapState } from 'vuex'
export default {
  name: 'List',
  props: {
    allCities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapState({
      'clickCity': 'city' // 对象方式映射
    })
  },
  watch: {
    letter () {
      const element = this.$refs[this.letter][0]
      this.scroll.scrollToElement(element)
    }
  },
  methods: {
    handleCityClick (city) {
      // this.$store.dispatch('changCity', city) // 异步
      // this.$store.commit('changCity', city)// 同步
      this.changCity(city) // mapMutations 映射过来简写
      this.$router.push('/')
    },
    ...mapMutations(['changCity'])
  },
  mounted () {
    // Bscroll默认点击事件关闭的 需要手动开启
    this.scroll = new Bscroll(this.$refs.wrapper, {click: true})
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
